The invention discloses a low-odor spray-molded automobile dashboard material and a preparation method thereof. The spray-molded automobile dashboard material comprises two layers, the surface layer is a water-based two-component in-mold paint layer, and the film inner paint is dispersed by water-based polyurethane The body reacts with the aliphatic curing agent to form a film with a certain thickness, the thickness is 10-100μm; the inner layer is a polyurethane layer, and the polyurethane layer contains amino polyether, polyether polyol, chain extender, cross-linking agent, catalyst, etc. and isocyanate compound Formed by polymerization reaction, thickness 0.5‑5 mm. When the material of the present invention is used to prepare an instrument panel, especially when the parts of the instrument panel are in different directions, the material can be solidified rapidly and the sagging phenomenon is avoided. In addition, the instrument panel made of the above materials has reasonable mechanical properties, excellent surface properties and aging resistance, which improves the explosion problem of the safety airbag of the car in an accident and improves the safety performance of the car. The invention discloses a preparation method of the instrument panel material.